Method for enhancing low-illumination image
US10614561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2017 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Aug 4, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20221
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a method for enhancing a low-illumination image based on a camera response characteristic, including: selecting an exposure model and obtaining a camera response equation model corresponding thereto; determining a parameter of the camera response equation model; estimating an exposure ratio of a multi-exposure image sequence to be generated to an original image so as to generate the multi-exposure image sequence; and performing image fusion on multi-exposure images to obtain an enhanced image with a better visual effect and less distortion. The method can solve the problem that existing low-illumination image enhancement algorithms introduce more artificial traces while enhancing images, and can obtain the enhanced image with the better visual effect and less distortion, thereby obtaining the enhanced image preserving naturalness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.